Australian G20 organisers have been left red-faced after it was revealed an email autofill error led to a leak of passport details for 31 world leaders, including Barack Obama, Vladimir Putin and more.

Telecommunications and internet service providers will now be required to store their customers' metadata for at least two years under laws that passed the Australian parliament with little opposition.

TPG's $1.4 billion takeover bid for iiNet has met with notable criticism from iiNet's founder, who says the deal is not in the best interest of shareholders and the company's board has "run out of ideas."

In a bid to pass data retention laws, Tony Abbott has proposed warrants to access journalists' metadata. But the press union has rejected the calls, saying confidential sources should be kept confidential, whether a warrant is involved or not.